Which statement about the activation energy shown on a reaction profile is correct?
It is measured from the energy of the products up to the peak of the curve
It is measured from the energy of the reactants to the energy of the products
It is measured from the bottom of the energy axis up to the peak of the curve
It is measured from the energy of the reactants up to the peak of the curve
85 exam-style questions on AQA GCSE Chemistry 5.1 Exothermic and endothermic reactions, covering 5.1.1 Energy transfer during exothermic and endothermic reactions, 5.1.2 Reaction profiles, and 5.1.3 The energy change of reactions. Each one has a worked solution and a mark scheme showing where the marks go.